From owner-freebsd-hackers Wed Apr 14 19: 7:21 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from rina.naklab.dnj.ynu.ac.jp (rina.naklab.dnj.ynu.ac.jp [133.34.17.16]) by hub.freebsd.org (Postfix) with ESMTP id 6E34A14C4F; Wed, 14 Apr 1999 19:07:17 -0700 (PDT) (envelope-from tanimura@naklab.dnj.ynu.ac.jp) Received: from rina.naklab.dnj.ynu.ac.jp (localhost [127.0.0.1]) by rina.naklab.dnj.ynu.ac.jp (8.9.3/3.7W-Naklab-2.1-19981120) with ESMTP id LAA33326; Thu, 15 Apr 1999 11:04:39 +0900 (JST) Message-Id: <199904150204.LAA33326@rina.naklab.dnj.ynu.ac.jp> To: nox@jelal.kn-bremen.de Cc: zinnia@jan.ne.jp, freebsd-hackers@freebsd.org, freebsd-multimedia@freebsd.org Cc: Seigo TANIMURA Subject: Re: Call for Review: Voxware midi driver for serial ports From: Seigo TANIMURA In-Reply-To: Your message of "Wed, 14 Apr 1999 22:43:45 +0200" References: <19990414224345.A99120@saturn.kn-bremen.de> X-Mailer: Mew version 1.70 on Emacs 19.34.1 / Mule 2.3 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Thu, 15 Apr 1999 11:04:39 +0900 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 14 Apr 1999 22:43:45 +0200, Juergen Lock said: >> We have at least one product to convert a serial port to a midi port and vice versa: >> >> http://www.midi-classics.com/p2615.htm >> >> has one midi output and one input, although our driver is not capable to receive midi signal yet. nox> Huh, it is send only? :) or do you mean with that interface... What nox> would be required to make it work? Sorry, I had a misunderstanding. Tsuyoshi-san pointed me out that our driver is able to receive midi signal as well. I was just not able to test by myself... Using Portman PC/S, you will have something like this: 38.4kbps 31.25kbps PC ---------- Portman PC/S ----------- Midi Module Portman Midi Serial Cable Cable Portman transforms the singal bitrate and the electrical characteristics. Portman has its own cable contained in the product. Since I do not have a Portman now, I am not convinced whether we can drive it using our driver or not. Things will be tough if Portman cooks the signal from and/or to PC. This seems more likely for the multi-port midi-serial interfaces, especially the ones capable to select the {in,out}out ports by the PC. For the modules with serial interfaces(most modern ones like Roland SC-88 have): 38.4kbps PC ----------------------------- Midi Module Serial Cable for the Module I got to play sequences successfully under the situation shown above. I used SC-88, with a 'computer port'. It accepts the bitrates of both 31.25kbps and 38.4kbps, transforming the signal internally. You can plug some other midi modules and instruments to the module connected to the PC. In this case the module also acts as a midi interface. Seigo TANIMURA |M2, Nakagawa Lab, Dept of Electronics & CS =========================|Faculty of Engineering, Yokohama National Univ Powered by SIEMENS, |http://www.naklab.dnj.ynu.ac.jp/~tanimura/ FreeBSD 4.0-CURRENT |http://www.sakura.ne.jp/~tcarrot/ (10th Apr 1999) & muesli.|tanimura@naklab.dnj.ynu.ac.jp tcarrot@sakuramail.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message